Zero-Server Latency
Your data never leaves your browser. Our JavaScript-based masking ensures total privacy.
100% Client-Side Processing
GDPR & HIPAA Ready Context
Mask Sensitive Data for AI in Seconds
The fastest, locally-processed PII redaction tool. Protect your privacy before hitting "Send" on ChatGPT.
Masking Utility
Supported: TXT, CSV, JSON, SQL, DOC, DOCX, ODT.
Masked Output
Your masked data will appear here...
PII Selector (10 selected)
Smart Entity Recognition
Detect names, emails, phone numbers, identifiers, and other sensitive entities with adaptable rules built for real-world text.
AI-Ready Context
Preserve sentence meaning while replacing secrets, so models can still reason effectively without direct access to personal data.
Why use Data Masking for AI Prompts?
Sharing sensitive information with LLMs (Large Language Models) can lead to data leaks. DataMasker.io provides enterprise-grade data masking and anonymization techniques to ensure your company's PII stays safe while leveraging AI productivity.
Supported Data Formats
- CSV Masking: Clean your datasets before analysis.
- SQL Scrubbing: Remove sensitive identifiers from database logs.
- JSON Redaction: Sanitize API responses for testing.
Before and After Examples by Format
Real masking examples for CSV, JSON, and SQL files using the DataMasker utility.
CSV Data Masking
Remove direct identifiers from exported tables before analytics, demos, or model prompts.
JSON Payload Masking
Keep JSON keys and schema intact while replacing sensitive values with deterministic tokens.
SQL Log Masking
Clean INSERT statements and troubleshooting logs to avoid exposing personal or network data.
FAQ
Does the tool store my data?
No. DataMasker.io does not store or transmit your content. It is a safe data masking tool that runs 100% client-side in your browser.
How does masking work for JSON?
We preserve the JSON structure (including braces and nesting like {}) and only replace sensitive values with masked tokens, so the format remains valid.
Is it compatible with GDPR compliance?
Yes. DataMasker.io is designed as a GDPR compliant masking tool, reducing exposure of personal data before sharing content with AI models.
Can I use it for SQL database logs?
Yes. It is ideal for cleaning INSERT statements and other SQL logs containing sensitive data before debugging, sharing incidents, or sending examples to AI tools.
What is data masking vs anonymization?
While both protect privacy, our tool uses advanced masking to ensure data utility remains high for AI models.
Is it safe to use DataMasker.io?
Yes. Unlike other tools, we do not have a database. Everything happens in your local RAM.
Is DataMasker an anonymization or a pseudonymization tool?
Technically, DataMasker.io is a pseudonymization tool. While many users search for a way to anonymize data before sending it to AI models, true anonymization must be irreversible. DataMasker uses deterministic masking (pseudonymization) to ensure your PII is protected and replaced with consistent values, which is the gold standard for maintaining data utility in LLMs while staying GDPR compliant.
Learn More About Data Protection Methods
Explore our in-depth comparison to understand when masking is a better choice than tokenization for AI workflows.